package com.sangeng.handler;

import com.alibaba.fastjson.JSON;
import com.sangeng.domain.ResponseResult;
import com.sangeng.utils.WebUtils;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 自定义授权认证异常处理
 * 1.重写对应异常接口 2.securityConfig经行配置
 ​ 如果是认证过程中出现的异常会被封装成AuthenticationException然后调用AuthenticationEntryPoint对象的方法去进行异常处理。
 * 来完成自定义异常处理
 */
@Component
public class AuthenticationEntryPointImpl implements AuthenticationEntryPoint {
    @Override
    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
        ResponseResult result = new ResponseResult(HttpStatus.UNAUTHORIZED.value(),"用户认证失败请查询登录");
        String json = JSON.toJSONString(result);//对象转换为String
        //处理异常 //错误信息用json格式返回
        WebUtils.renderString(response,json);//调用工具类把响应response  string转换为·json字符串写入响应体
    }
}
